Braided occlusion device having an inner compression spring

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Solution Overview

Problem

Current intravascular devices face challenges in efficiently occluding aneurysms of varying sizes and shapes, leading to increased costs and manufacturing demands due to the need for multiple device designs.

Innovation Solution

An intravascular device design featuring a shaped braid with distal and proximal layers and an inner member, capable of transitioning between elongated and unrestrained configurations, utilizing superelastic materials like Nitinol to achieve full occlusion and stasis, with optional radiopaque features for visibility during fluoroscopy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple intravascular devices of different sizes are used to address aneurysms of varying sizes and shapes, then the ability to adequately occlude different aneurysms is improved, but the cost of the procedure and manufacturing demands increase

Engineering Contradiction:

Improveability to occlude different aneurysm sizes and shapesVSAvoidnumber of different device designs required

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The intravascular device incorporates a braid structure that can dynamically change its configuration from a compressed delivery state to an expanded occlusion state. The braid layers are designed to transition between different shapes and sizes, allowing a single device to adapt to various aneurysm geometries rather than requiring multiple fixed-size devices

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The device is designed as a universal occlusion device that can function across a range of aneurysm sizes and shapes. The braid structure with its ability to expand and conform, combined with the controllable release mechanism, enables one device design to perform the function of multiple specialized devices

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If the intravascular device is designed to fully occlude the aneurysm opening and achieve flow stasis, then the occlusion effectiveness is improved, but the device must be precisely sized and shaped which increases manufacturing complexity

Engineering Contradiction:

Improveocclusion effectiveness and flow stasis achievementVSAvoiddevice sizing and shaping requirements

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The device utilizes changes in physical parameters - specifically the transition from a compressed state during delivery to an expanded state at the target site. The braid structure's ability to change its dimensional parameters (length, diameter, volume) allows the device to achieve precise occlusion fit without requiring multiple precisely-manufactured size variants

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The device is pre-configured in a compressed delivery state that facilitates navigation through vasculature, then transforms at the target site to the expanded occlusion state. This preliminary configuration allows the device to be delivered through standard catheters and then deploy to achieve full occlusion, separating the delivery requirements from the occlusion requirements

Inventive Principle:

Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The device effectively occludes aneurysms by compressing into a disc shape, providing full occlusion and flow stasis, while reducing the need for multiple device sizes and lowering manufacturing costs.

Implementation Method 1

an inner member having a proximal end and a distal end. In some examples, the proximal end of the inner member can be connected to the proximal braid layer and the distal end of the inner member can be connected to the distal braid layer

Methodology Applied

Scientific EffectSpring compression: Spring

Implementation Method 2

utilizing superelastic materials like Nitinol to achieve full occlusion and stasis

Methodology Applied

Scientific EffectSuperelasticity: Pseudoelasticity

Data Source

PatentUS20250325271A1Braided occlusion device having an inner compression spring

Publication Date: 2025.10.23 DEPUY SYNTHES PROD INC

AI summary

An intravascular device that includes a delivery sheath, a shaped braid comprising a distal braid layer and a proximal braid layer, and an inner member comprising a proximal end and a distal end, the inner member disposed between the proximal braid layer and the distal braid layer of the shaped braid. The intravascular device further includes a first configuration, the shaped braid and the inner member having a first length, and a second configuration, the shaped braid and the inner member having a second length wherein the first length is greater than the second length.